diff --git a/pkgs/development/libraries/haskell/setlocale/default.nix b/pkgs/development/libraries/haskell/setlocale/default.nix
new file mode 100644
index 00000000000..09ffc7159a4
--- /dev/null
+++ b/pkgs/development/libraries/haskell/setlocale/default.nix
@@ -0,0 +1,12 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "setlocale";
+  version = "0.0.3";
+  sha256 = "08pd20ibmslr94p52rn6x9w3swn9jy7vjlvxzw29h8dlqgmvcrjl";
+  meta = {
+    description = "A Haskell interface to setlocale()";
+    license = self.stdenv.lib.licenses.publicDomain;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/development/libraries/haskell/wcwidth/default.nix b/pkgs/development/libraries/haskell/wcwidth/default.nix
new file mode 100644
index 00000000000..0307642f62b
--- /dev/null
+++ b/pkgs/development/libraries/haskell/wcwidth/default.nix
@@ -0,0 +1,16 @@
+{ cabal, attoparsec, setlocale, utf8String }:
+
+cabal.mkDerivation (self: {
+  pname = "wcwidth";
+  version = "0.0.2";
+  sha256 = "1n1fq7v64b59ajf5g50iqj9sa34wm7s2j3viay0kxpmvlcv8gipz";
+  isLibrary = true;
+  isExecutable = true;
+  buildDepends = [ attoparsec setlocale utf8String ];
+  meta = {
+    homepage = "http://github.com/solidsnack/wcwidth/";
+    description = "Native wcwidth";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 1f993dd4b67..2a4dc66b82d 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1879,6 +1879,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   setenv = callPackage ../development/libraries/haskell/setenv {};
 
+  setlocale = callPackage ../development/libraries/haskell/setlocale {};
+
   shelly = callPackage ../development/libraries/haskell/shelly {};
 
   simpleReflect = callPackage ../development/libraries/haskell/simple-reflect {};
@@ -2354,6 +2356,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   warpTls = callPackage ../development/libraries/haskell/warp-tls {};
 
+  wcwidth = callPackage ../development/libraries/haskell/wcwidth {};
+
   webRoutes = callPackage ../development/libraries/haskell/web-routes {};
 
   webRoutesBoomerang = callPackage ../development/libraries/haskell/web-routes-boomerang {};